v-tab.js
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// components/v-tab/v-tab.js
const sliderWidth = 65
const app = getApp()
Component({
/**
* 组件的属性列表
*/
externalClasses: ['extra-class'],
properties: {
dataList: {
type: Array,
value: [],
observer(selectIndex) {
this.menuData()
}
},
type: {
type: String,
value: 'array' // array 为 [1,2,3] 格式 objectArray 为 [{}]格式
},
selectIndex: {
type: Number,
value: 0,
observer(selectIndex) {
this.menuData()
}
}
},
/**
* 组件的初始数据
*/
data: {
sliderOffset: 0,
sliderLeft: 0
},
// observers: {
// 'selectIndex': function(selectIndex) {
// this.menuData()
// }
// },
lifetimes: {
attached() {
this.menuData()
}
},
/**
* 组件的方法列表
*/
methods: {
menuData() {
wx.getSystemInfo({
success: res => {
this.setData({
sliderLeft: (res.windowWidth / this.data.dataList.length - sliderWidth) / 2,
sliderOffset: res.windowWidth / this.data.dataList.length * this.data.selectIndex
})
}
})
},
tabClick(e) {
const { offsetLeft, id } = e.currentTarget
this.setData({
sliderOffset: offsetLeft,
selectIndex: id
})
if (this.data.type === 'array') {
this.triggerEvent('selectIndex', Number(id))
}
if (this.data.type === 'objectArray') {
this.triggerEvent('selectIndex', this.data.dataList[id].id)
}
}
}
})